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Table 3 Comparison of basic characteristics between subjects lost to follow-up and those with complete participation at baseline

From: Effectiveness of a school-based physical activity intervention on obesity in school children: a nonrandomized controlled trial

Characteristic Subjects lost to follow-up Subjects with complete participation P value
  (N = 88) (N = 832)  
Age, mean (SD), y 10.5 (1.9) 11.0 (2.3) 0.067
Sex, no. (%)
Boys 43 (48.9) 446 (53.5) 0.403
Girls 45 (51.1) 387 (46.5)  
Body mass index, mean (SD), kg/m2 18.78 (4.33) 19.67 (4.41) 0.070
Overweight/obesity, no. (%) 31 (35.2) 308 (37.0) 0.746
Duration of MVPA (min/day)a 37.1 (35.0) 46.7 (56.7) 0.141
In school 25.7 (24.3) 29.4 (36.1) 0.369
Out of school 11.5 (17.7) 17.3 (31.1) 0.100
  1. aSubjects with complete 7-day records were included in analysis (88 subjects lost to follow-up, 738 subjects with complete participation).
  2. MVPA: moderate to vigorous physical activity.